CN220657469U - Urea hydrolysis reactor with chloride ion on-line measuring function - Google Patents
Urea hydrolysis reactor with chloride ion on-line measuring function Download PDFInfo
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- CN220657469U CN220657469U CN202321888730.0U CN202321888730U CN220657469U CN 220657469 U CN220657469 U CN 220657469U CN 202321888730 U CN202321888730 U CN 202321888730U CN 220657469 U CN220657469 U CN 220657469U
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- hydrolysis reactor
- reaction liquid
- container
- sampling tube
- detection
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- 230000007062 hydrolysis Effects 0.000 title claims abstract description 66
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 66
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 41
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000004202 carbamide Substances 0.000 title claims abstract description 26
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 70
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 238000005070 sampling Methods 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 22
- 238000005406 washing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003599 detergent Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 28
- 229910021529 ammonia Inorganic materials 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000011897 real-time detection Methods 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The utility model discloses a urea hydrolysis reactor with a chloride ion on-line detection function, which comprises a hydrolysis reactor body, wherein a sampling tube is communicated with the hydrolysis reactor body, a detection container is communicated with the end part of the sampling tube, which is far away from the hydrolysis reactor body, a chloride ion concentration meter is arranged on the detection container, and a reaction liquid inlet control valve is arranged on the sampling tube. In the process of the ammonia production operation of the hydrolysis reactor, the reaction liquid in the hydrolysis reactor can be led into the detection container through the sampling tube, so that the chloride ion concentration meter on the detection container can detect the chloride ion concentration in the reaction liquid, thereby realizing the online detection of the hydrolysis reactor. According to the real-time detection result, the staff can adjust the production equipment in real time, so that the situation that the hydrolysis reactor runs in the environment of high concentration chloride ions for a long time, so that the heat exchange efficiency of the hydrolysis reactor is low and the equipment is corroded, damaged and leaked is avoided.
Description
Technical Field
The utility model relates to the technical field of urea hydrolysis ammonia production equipment, in particular to a urea hydrolysis reactor with a chloride ion on-line detection function.
Background
In a system for denitration treatment of flue gas, selective Catalytic Reduction (SCR) is the most widely used denitration technology, and the selective catalytic reduction denitration technology uses ammonia as a reducing agent to reduce nitrogen oxides into nitrogen and water harmless to the environment under the action of a catalyst, and the ammonia has high removal efficiency on nitrogen oxide components in the flue gas, especially nitric oxide. The preparation method of ammonia comprises the steps of preparing ammonia by evaporating liquid ammonia, preparing ammonia by evaporating ammonia water and preparing ammonia by hydrolyzing/pyrolyzing urea, and the liquid ammonia and the ammonia water are inflammable and explosive, thus belonging to chemical dangerous goods and having higher requirements on transportation and storage. In contrast, urea is chemically stable, non-toxic, and easier to transport and store. The urea hydrolysis process is mainly to hydrolyze urea into ammonia and carbon dioxide by heating urea solution, and the ammonia obtained by hydrolysis is used for denitration treatment of flue gas.
At present, the urea hydrolysis ammonia production technology is a main stream technology for preparing a denitration reducing agent, but due to the original quality of urea particles and the quality of water sources, the conditions of low heat exchange efficiency of a hydrolyzer, equipment corrosion damage and leakage caused by overhigh concentration of chloride ions in reaction liquid in the hydrolysis reactor occur in a plurality of projects, and the normal operation of a denitration system is seriously influenced.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a urea hydrolysis reactor with a chloride ion on-line detection function.
The aim of the utility model is realized by the following technical scheme:
the utility model provides a urea hydrolysis reactor with chloride ion on-line measuring function, includes the hydrolysis reactor body, the intercommunication is provided with the sampling tube on the hydrolysis reactor body, the sampling tube is kept away from the tip intercommunication of hydrolysis reactor body has the detection vessel, be provided with the chloride ion concentration meter on the detection vessel, be provided with reaction solution import control valve on the sampling tube.
The detection container is also provided with a first temperature meter.
The detection container is also provided with a first liquid level meter.
The sampling tube is positioned between the hydrolysis reactor body and the detection container and is also communicated with the container to be detected, the reaction liquid inlet control valve is arranged between the hydrolysis reactor body and the container to be detected, and the sampling tube is positioned between the container to be detected and the detection container and is also provided with the reaction liquid outlet control valve to be detected.
The sampling tube is positioned between the container to be detected and the hydrolysis reactor body, a reaction liquid cooling device is further communicated with the hydrolysis reactor body, the reaction liquid inlet control valve is arranged between the reaction liquid cooling device and the hydrolysis reactor body, and a cooling reaction liquid outlet control valve is arranged between the reaction liquid cooling device and the container to be detected.
And a second temperature meter and a second liquid level meter are arranged on the container to be detected.
The washing device is arranged on the sampling tube between the hydrolysis reactor body and the reaction liquid cooling device and is communicated with the sampling tube through a connecting tube, and the washing device can provide detergent for the sampling tube so as to flush the sampling tube, the reaction liquid cooling device, the container to be detected and the detection container.
The detergent comprises desalted water or is hydrophobic.
Still include the PLC switch board, the chloride ion concentration meter with the PLC switch board electricity is connected, the PLC switch board is connected with DCS control system electricity.
The beneficial effects of the utility model are as follows: in the process of the ammonia production operation of the hydrolysis reactor, the reaction liquid in the hydrolysis reactor can be led into the detection container through the sampling tube, so that the chloride ion concentration meter on the detection container can detect the chloride ion concentration in the reaction liquid, thereby realizing the online detection of the hydrolysis reactor. According to the real-time detection result, the staff can adjust the production equipment in real time, so that the situation that the hydrolysis reactor runs in the environment of high concentration chloride ions for a long time, so that the heat exchange efficiency of the hydrolysis reactor is low and the equipment is corroded, damaged and leaked is avoided.
Drawings
FIG. 1 is a schematic diagram of a pipeline structure according to an embodiment;
reference numerals: 1. a hydrolysis reactor body; 2. a sampling tube; 3. a detection container; 4. a chloride ion concentration meter; 5. a reaction liquid inlet control valve; 6. a first temperature meter; 7. a first liquid level meter; 8. a container to be inspected; 9. a reaction liquid outlet control valve to be detected; 10. a reactant liquid cooling device; 11. a cooling reaction liquid outlet control valve; 12. a second temperature measuring meter; 13. a second liquid level meter; 14. a connecting pipe; 15. a washing device; 16. PLC control cabinet.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.
As shown in fig. 1, a urea hydrolysis reactor with a chloride ion on-line detection function comprises a hydrolysis reactor body 1. Wherein, the hydrolysis reactor body 1 is provided with a sampling tube 2, the sampling tube 2 can lead out the reaction liquid in the hydrolysis reactor, and the sampling tube 2 is provided with a reaction liquid cooling device 10, a container 8 to be detected and a detection container 3 in sequence. Thus, the sampling tube 2 can introduce the reaction liquid in the hydrolysis reactor into the reaction liquid cooling device 10, the container 8 to be inspected, and the inspection container 3 in this order. For example, the sampling tube 2 may be connected to a drain of a hydrolysis reactor, which will facilitate the installation and sampling of the sampling tube 2. In detail, the reaction liquid cooling device 10 may cool the reaction liquid, for example, the reaction liquid cooling device 10 may employ a cooling device that exchanges heat by a coolant; the container 8 to be detected can pre-store the cooled reaction liquid; when the reaction liquid enters the detection container 3, the chloride ion concentration meter 4 arranged on the detection container 3 can detect the chloride ion concentration of the reaction liquid, so that the on-line detection of the hydrolysis reactor is realized.
Correspondingly, a reaction liquid inlet control valve 5 is arranged on the sampling tube 2 positioned between the hydrolysis reactor body 1 and the reaction liquid cooling device 10; a cooling reaction liquid outlet control valve 11 is arranged on the sampling tube 2 positioned between the reaction liquid cooling device 10 and the container 8 to be detected; the sampling tube 2 positioned between the container 8 to be detected and the detection container 3 is provided with a reaction liquid outlet control valve 9 to be detected. It will be appreciated that each of the three control valves described above is used to control the flow of the reaction solution to the subsequent devices and/or vessels. Therefore, in the process of the ammonia production operation of the hydrolysis reactor, the reaction liquid inlet control valve 5 can be opened first, so that the reaction liquid enters the reaction liquid cooling device 10 for cooling, and the reaction liquid cooling device 10 can accelerate the cooling speed of the reaction liquid so as to reach the detectable threshold temperature more quickly; then the cooling reaction liquid outlet control valve 11 is opened, so that the cooled reaction liquid gradually enters the container 8 to be detected for pre-storing; then, the control valve 9 of the outlet of the reaction liquid to be detected is opened, so that the reaction liquid enters the detection container 3 for detecting the concentration of chloride ions.
In some embodiments, a second temperature meter 12 and a second liquid level meter 13 are arranged on the container 8 to be detected; the detection container 3 is also provided with a first temperature measuring meter 6 and a first liquid level measuring meter 7. Therefore, as the cooled reaction liquid gradually enters the container 8 to be detected, the second temperature meter 12 on the container 8 to be detected can detect the temperature of the reaction liquid to determine whether the reaction liquid reaches the detectable threshold temperature. Meanwhile, the second liquid level meter 13 can detect whether the liquid level of the pre-stored reaction liquid reaches a preset value, that is, the second liquid level meter 13 can detect whether the reaction liquid reaches a detectable capacity value. For example, when the pre-stored reaction liquid capacity value is insufficient, the closing state of the reaction liquid outlet control valve 9 to be detected is maintained; when the liquid level of the pre-stored reaction liquid reaches a preset value, the control valve 9 of the reaction liquid outlet to be detected is opened, so that the reaction liquid enters the detection container 3 to detect the concentration of chloride ions.
The first temperature measuring meter 6 and the first liquid level measuring meter 7 have the same functions as the second temperature measuring meter 12 and the second liquid level measuring meter 13, and when the reaction liquid enters the detection container 3, the second temperature measuring meter 12 detects the temperature of the reaction liquid for the second time so as to ensure that the temperature of the reaction liquid is at a detectable threshold temperature when the chlorine ion concentration meter 4 detects operation; meanwhile, the second liquid level meter 13 detects the liquid level of the reaction liquid, and when the liquid level of the reaction liquid reaches a preset value, the chloride ion concentration meter 4 performs detection operation.
Therefore, the volume of the container 8 to be detected is preferably larger than the volume of the detecting container 3, which is beneficial to keeping the continuity of the online detection of the reaction liquid, for example, the container 8 to be detected can store more reaction liquid, and the detecting container 3 can continuously detect the reaction liquid.
In order to realize the self-cleaning function of the hydrolysis reactor chloride ion on-line detection module, a washing device 15 is also communicated and arranged on the sampling tube 2 between the hydrolysis reactor body 1 and the reactant liquid cooling device 10 through a connecting tube 14. The washing device 15 can supply a detergent into the sampling tube 2, and repeatedly washes the sampling tube 2, the reactant liquid cooling device 10, the container 8 to be detected and the detection container 3 through the detergent, so that no reactant liquid residue is ensured in the chloride ion online detection module. For example, the washing agent may be desalted water or hydrophobic water, and the washing device 15 may be provided with a pumping device, and the desalted water or hydrophobic water is pumped into the sampling tube 2 by the pumping device to clean the chloride ion online detection module.
In addition, the present disclosure further includes a PLC control cabinet 16, where the chloride ion concentration meter 4, the liquid level meter, and the temperature meter are all electrically connected to the PLC control cabinet 16, and the electrical signal of the measurement sensor is received by the PLC control cabinet 16, and at the same time, the opening or closing of the corresponding control valve can be controlled according to the detection result. Preferably, the PLC control cabinet 16 is electrically connectable to a DCS control system of the plant. For example, when the value detected by the chloride ion concentration meter 4 is abnormal, the chloride ion concentration signal may be sent to the DCS for on-line monitoring and alarm.
The foregoing is merely a preferred embodiment of the utility model, and it is to be understood that the utility model is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.
Claims (9)
1. The urea hydrolysis reactor with the chloride ion on-line detection function comprises a hydrolysis reactor body (1), and is characterized in that: the hydrolysis reactor comprises a hydrolysis reactor body (1), wherein a sampling tube (2) is communicated with the hydrolysis reactor body (1), a detection container (3) is communicated with the end part of the hydrolysis reactor body (1) away from the sampling tube (2), a chloride ion concentration meter (4) is arranged on the detection container (3), and a reaction liquid inlet control valve (5) is arranged on the sampling tube (2).
2. The urea hydrolysis reactor with the function of on-line detection of chloride ions according to claim 1, which is characterized in that: the detection container (3) is also provided with a temperature meter I (6).
3. The urea hydrolysis reactor with the function of on-line detection of chloride ions according to claim 1, which is characterized in that: the detection container (3) is also provided with a liquid level meter I (7).
4. The urea hydrolysis reactor with the function of on-line detection of chloride ions according to claim 1, which is characterized in that: the sampling tube (2) is located between the hydrolysis reactor body (1) and the detection container (3) and is also communicated with a container (8) to be detected, the reaction liquid inlet control valve (5) is arranged between the hydrolysis reactor body (1) and the container (8) to be detected, and the sampling tube (2) is located between the container (8) to be detected and the detection container (3) and is also provided with a reaction liquid outlet control valve (9) to be detected.
5. The urea hydrolysis reactor with the function of chlorine ion on-line detection according to claim 4, which is characterized in that: the sampling tube (2) is located between the container (8) to be detected and the hydrolysis reactor body (1) and is also communicated with a reaction liquid cooling device (10), the reaction liquid inlet control valve (5) is arranged between the reaction liquid cooling device (10) and the hydrolysis reactor body (1), and the sampling tube (2) is located between the reaction liquid cooling device (10) and the container (8) to be detected and is provided with a cooling reaction liquid outlet control valve (11).
6. The urea hydrolysis reactor with the function of chlorine ion on-line detection according to claim 4, which is characterized in that: the container (8) to be detected is provided with a second temperature measuring meter (12) and a second liquid level measuring meter (13).
7. The urea hydrolysis reactor with the function of chlorine ion on-line detection according to claim 5, wherein the urea hydrolysis reactor is characterized in that: the washing device (15) is arranged on the sampling tube (2) between the hydrolysis reactor body (1) and the reaction liquid cooling device (10) and communicated with the sampling tube through the connecting tube (14), and the washing device (15) can provide a detergent for the sampling tube (2) so as to flush the sampling tube (2), the reaction liquid cooling device (10), the container (8) to be detected and the detection container (3).
8. The urea hydrolysis reactor with the function of chlorine ion on-line detection according to claim 7, wherein the urea hydrolysis reactor is characterized in that: the detergent comprises desalted water or is hydrophobic.
9. The urea hydrolysis reactor with the function of on-line detection of chloride ions according to claim 1, which is characterized in that: still include PLC switch board (16), chloride ion concentration meter (4) with PLC switch board (16) electricity is connected, PLC switch board (16) are connected with DCS control system electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321888730.0U CN220657469U (en) | 2023-07-18 | 2023-07-18 | Urea hydrolysis reactor with chloride ion on-line measuring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321888730.0U CN220657469U (en) | 2023-07-18 | 2023-07-18 | Urea hydrolysis reactor with chloride ion on-line measuring function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220657469U true CN220657469U (en) | 2024-03-26 |
Family
ID=90329721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321888730.0U Active CN220657469U (en) | 2023-07-18 | 2023-07-18 | Urea hydrolysis reactor with chloride ion on-line measuring function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220657469U (en) |
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2023
- 2023-07-18 CN CN202321888730.0U patent/CN220657469U/en active Active
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